/**
 * Copyright 2008 Matthew Purland (m.purland@gmail.com)
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.variance.version.diff.strategy;

import java.util.ArrayList;
import java.util.List;

import org.variance.version.diff.DefaultDifference;
import org.variance.version.diff.Difference;
import org.variance.version.diff.DifferenceType;
import org.variance.version.diff.Differentiable;
import org.variance.version.diff.LCS;

public class TextDiffStrategyLCS implements TextDiffStrategy {

	/**
	 * {@inheritDoc}
	 */
	public List<Difference<String>> computeDifference(
			Differentiable<String> differentiableLeft,
			Differentiable<String> differentiableRight) {
		List<Difference<String>> textDifferenceList = new ArrayList<Difference<String>>();
		String differenceLCS = LCS.computeLCS(differentiableLeft
				.getDifferentiableData(), differentiableRight
				.getDifferentiableData());
		// TODO DifferenceType is wrong...fix when API is finished.
		// TODO Should calculate all differences
		Difference<String> difference = new DefaultDifference<String>(
				differenceLCS, DifferenceType.CHANGED);
		textDifferenceList.add(difference);
		return textDifferenceList;
	}

}
